All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788380

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=fee34d7298675479cc35311b41a02000b327627060130b1c8a1ca2a1c35ccf73


Bot(s) for this bug's original alert(s):

android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962042112004865184

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Ian Kilpatrick
  Commit : 98b46470f307a68c8183d628237d7b361af96244
  Date   : Tue Nov 21 01:22:24 2017
  Subject: Add secure_context_mode_ to CSSParserContext.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.css
  Metric       : CSSPropertySetterGetter/CSSPropertySetterGetter
  Change       : 40.02% | 556.830084098 -> 333.996141489

Revision             Result                  N
chromium@517977      556.83 +- 8.3199        6      good
chromium@518004      574.541 +- 5.12348      6      good
chromium@518011      552.816 +- 7.47207      6      good
chromium@518014      549.277 +- 6.83537      6      good
chromium@518015      553.427 +- 2.25051      6      good
chromium@518016      330.787 +- 1.83432      6      bad       <--
chromium@518017      330.191 +- 2.59885      6      bad
chromium@518030      333.996 +- 2.7272       6      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.css

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962042112004865184


For feedback, file a bug with component Speed>Bisection